For added flexibility, customers can replace the Avaya 2420 Digital Telephone stand with the 20A Telephone Set Module Adapter, which provides two headset jacks to support call center environments. This module also expands functionality with support for the 200A Tip/Ring Module, and the 201A Recorder Interface Module (RIM). Note: When any of the expansion modules are connected, you must connect an auxiliary power supply to the telephone. An1151B1 local power supply (material code: 175706) or an 1151B2 local power supply (material code: 177087) with Battery Holdover is recommended.
